chore(build): preparing for CI

nix/package.nix

@@ -1,4 +1,5 @@
 {
+  pkgs,
   rustPlatform,
   ...
 }: let
@@ -8,8 +9,17 @@
   rustBuild = rustPlatform.buildRustPackage {
     pname = name;
     inherit version;
-    src = ../.;
+    src = pkgs.lib.cleanSource ../.;
     cargoLock.lockFile = ../Cargo.lock;
+    buildInputs = [ pkgs.upx ];
+    useNextest = true;
+    meta = {
+      description = "Conventional commits for Jujutsu";
+      homepage = "https://labs.phundrak.com/phundrak/jj-cz";
+    };
+    postBuild = ''
+      ${pkgs.upx}/bin/upx target/*/release/${name}
+    '';
   };
 in {
   default = rustBuild;